Get installed packages list
Export and Import packages list
Exportdpkg --get-selections
Importdpkt --set-selections
dpkg
Apt package download only
In order to download only package via apt, with a particular version
apt-get install --download-only metricbeat=7.6.1
.deb package you'll find atls -l /var/cache/apt/archives
Keep package version
Put it on holdsudo apt-mark hold
Remove from holdsudo apt-mark unhold
repair packages
sudo dpkg --configure -a
install missing dependencies
start with
dpkg -i package
install missing dependencies
apt-get install -f